CN105842649A - On-line detection system for secondary side power metering system of smart substation and detection method thereof - Google Patents
On-line detection system for secondary side power metering system of smart substation and detection method thereof Download PDFInfo
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- CN105842649A CN105842649A CN201610180115.2A CN201610180115A CN105842649A CN 105842649 A CN105842649 A CN 105842649A CN 201610180115 A CN201610180115 A CN 201610180115A CN 105842649 A CN105842649 A CN 105842649A
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- 238000001514 detection method Methods 0.000 title abstract description 9
- 238000005259 measurement Methods 0.000 claims abstract description 48
- 238000004891 communication Methods 0.000 claims abstract description 9
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 3
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- 210000001367 artery Anatomy 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 238000000691 measurement method Methods 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
本发明提供了智能变电站二次侧电能计量系统的在线检测系统及其测量方法，检测系统包括二次侧电流测量装置、二次侧电压测量装置和电能采集计算中心，二次侧电流测量装置、二次侧电压测量装置分别与变电站二次侧的电流合并单元和电压合并单元连接，二次侧电流测量装置、二次侧电压测量装置和电能采集计算中心均安装有同步授时器和无线网络通讯装置。本发明安装快捷、简便，可实现异地分布的电流合并单元、电压合并单元及支路的电能表的同步电能计量，可解决智能变电站电压合并单元与电流合并单元距离远、现场检测不安全的问题，确保电能计量的准确性。
The invention provides an online detection system and its measurement method for the secondary side electric energy metering system of an intelligent substation. The detection system includes a secondary side current measurement device, a secondary side voltage measurement device and an electric energy collection and calculation center, a secondary side current measurement device, The secondary side voltage measuring device is respectively connected to the current combining unit and the voltage combining unit on the secondary side of the substation. The secondary side current measuring device, the secondary side voltage measuring device and the power collection computing center are all equipped with a synchronous timer and wireless network communication device. The invention is quick and easy to install, can realize the synchronous electric energy metering of the current combining unit, the voltage combining unit and the electric energy meter of the branch distributed in different places, and can solve the problems that the distance between the voltage combining unit and the current combining unit of the intelligent substation is far away, and the on-site detection is not safe. , to ensure the accuracy of energy measurement.
Description
Technical field
The present invention relates to electric energy metrical field, be specifically related to on-line detecting system and the detection method thereof of intelligent substation secondary side electric energy metered system.
Background technology
Combining unit is the equipment rising with intelligent substation and occurring; current Intelligent Substation System builds and mainly includes several parts such as key-course, process layer, wall; process layer is responsible for transmitting the signals such as analog quantity, switching value, tripping operation; and combining unit is one of nucleus equipment of transformer station process layer; it is connected with the secondary side data-interface of electronic mutual inductor respectively; and the data-interface of protection measuring and controlling equipment connects, in order to realize the synchronous acquisition to analog quantitys such as transformer station's electric current and voltages and merging treatment.
Electric energy meter metering to having put into operation carries out in-site measurement, typically uses the loop combining unit measurement of On-line Measuring Method, i.e. substation secondary side and the electric energy meter metering of branch road.But due to electric current merge circuit units, voltage merges circuit units and electric energy meter to be generally strange land distributed, when carrying out the electric energy on-line metering measurement of substation secondary side and electric energy meter metering by loop combining unit, it is consistent that moment, period and the duration measured is unable to reach more accurate synchronization, often produce certain error in dipping, lack simultaneously and metering secondary is entered the quality of power supply of line analyze in real time and comparison, for the electric energy metrical in special periods such as peak of power consumption periods, the metering numerical value causing the secondary side electric energy of transformer station and electric energy meter is the most accurate.
To sum up, the result often making school survey is the most not satisfactory, causes the accuracy of the electric energy metrical of transformer station and reliability to reduce.
Summary of the invention
To be solved by this invention be above-mentioned in technical problem, there is provided a kind of electric energy metrical making substation secondary side to measure with the electric energy metrical of branch road electric energy meter and measure and keep Tong Bu, improve the on-line detecting system of the intelligent substation secondary side electric energy metered system of the accuracy of the two variable comparison.
And then ground, the present invention also provides for using the measuring method of above-mentioned on-line detecting system.
The technical solution adopted in the present invention is:
The on-line detecting system of intelligent substation secondary side electric energy metered system, it is characterised in that: include,
Secondary side current measurement apparatus, for gathering and measure the current-mode analog quantity of electric current combining unit；
Secondary side voltage measuring apparatus, for gathering and measure the voltage analog of voltage combining unit；
Electric energy acquisition calculates center, including electrical signal collection device and calculating correction values main frame, for the electricity of the electric energy meter of branch road, and above-mentioned secondary side current measurement apparatus and and the reception of coherent signal of secondary side voltage measuring apparatus output, and carry out COMPREHENSIVE CALCULATING；
Sync identification device, for several GPS or big dipper clock synchronization module, is connected with above-mentioned secondary side current measurement apparatus, secondary side voltage measuring apparatus, calculating correction values main frame respectively, for making three according to unified clock synchronous operation；
Radio network communication devices, for several wireless network cards, is connected with above-mentioned secondary side current measurement apparatus, secondary side voltage measuring apparatus, calculating correction values main frame respectively, communicates wirelessly and transmit with data between three.
Described electric energy meter is digitalized electrical energy meter, described voltage combining unit and electric current combining unit, is respectively connected to the optical Ethernet switch being arranged at therebetween by optical cable, it is achieved the analog quantity transmission between combining unit and electric energy meter.
Described GPS or big dipper clock synchronization module, be inside provided with pulse per second (PPS) device and B code advertiser.
Described wireless communication apparatus is GPRS module, by wireless access corresponding network, it is achieved wireless data transmission.
Use the measuring method of the on-line detecting system of intelligent substation secondary side electric energy metered system, comprise the following steps:
1), select tested voltage combining unit and electric current combining unit in substation secondary side, make outfan correspondence access voltage circuit and the current loop of electric energy meter by optical Ethernet switch；
2), by secondary side current measurement apparatus and secondary side voltage measuring apparatus serial line interface corresponding with the input circuit of electric current combining unit and voltage combining unit respectively connect；
3), the computer pulse outfan of electric energy meter is accessed electric energy acquisition and calculate center；
4), secondary side current measurement apparatus, secondary side voltage measuring apparatus and electric energy acquisition calculating center are assembled the most accordingly in GPS or big dipper clock synchronization module and wireless GPRS module, GPS or big dipper clock synchronization module and are provided with pulse per second (PPS) device；
5), by wireless network, secondary side current measurement apparatus, secondary side voltage measuring apparatus calculate center with electric energy acquisition respectively and are connected, and electric energy acquisition calculates center and calculates the communication channel at center as server, foundation with electric energy acquisition, builds measurement system；
6), according to the unified time, start secondary side current measurement apparatus, secondary side voltage measuring apparatus and electric energy acquisition at the timing synchronization drafted and calculate center, carry out the electric current of three-phase electricity, voltage signal acquisition, and the electrical energy pulse collection of electric energy meter, carry out the on-line measurement of electric energy metrical accuracy；
7), comprehensive secondary side current measurement apparatus, the variable of secondary side voltage measuring apparatus, and the electrical energy pulse variable of electric energy meter, compare the metering difference of combining unit and electric energy meter, it is thus achieved that measurement result；
8), complete to measure, secondary side current measurement apparatus, secondary side voltage measuring apparatus are disconnected with corresponding combining unit, restores to the original state.
Described step 2) in, before secondary side current measurement apparatus accesses the input circuit of electric current combining unit, need to be by the short circuit of this input circuit, it is ensured that electric current combining unit properly functioning.
Described step 6) in, the described unified time obtains according to pulse per second (PPS) device and the B code advertiser of described GPS or big dipper clock synchronization module.
Described step 6) in, on-line measurement content includes, false actuation test, firing test, constant are tested；Under balanced load, different capacity factor, the electric energy elementary error test of different current value；Under unbalanced load, different capacity factor, different current value forward meritorious, the most meritorious, forward is idle, the test of reverse reactive energy elementary error.
The present invention is quick for installation, easy, the synchronization electric energy metrical of the electric energy meter of electric current combining unit, voltage combining unit and the branch road of strange land distribution can be realized, intelligent transformer substation voltage combining unit can be solved with electric current combining unit apart from remote, the unsafe problem of Site Detection, improve the accuracy of electric energy numerical value.
Accompanying drawing explanation
Fig. 1 is the measuring principle figure of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is further described.
The on-line detecting system of the intelligent substation secondary side electric energy metered system of the present embodiment, it is provided with the electric energy acquisition for synthetical collection energy data calculating correction values difference and calculates center, electric energy acquisition calculates center and includes electrical signal collection device and calculating correction values main frame, and this electric energy acquisition calculates center and is provided with GPRS wireless communication module interface and GPS module or Big Dipper module.
The secondary side of transformer station is provided with the combining unit being made up of electric current combining unit and voltage combining unit, each electric current combining unit and voltage combining unit input circuit accessed secondary side current measurement apparatus and secondary side voltage measuring apparatus respectively, secondary side current measurement apparatus and secondary side voltage measuring apparatus the most all access GPRS wireless communication module interface and GPS module or Big Dipper module simultaneously, make secondary side current measurement apparatus and secondary side voltage measuring apparatus can calculate center with electric energy acquisition and carry out wireless data transmission.
In network system, the branch road of each electrical network all can be provided with electric energy meter, now based on digital electricity meter, and above-mentioned voltage combining unit and electric current combining unit, the optical Ethernet switch being arranged at therebetween it is respectively connected to, it is achieved the analog quantity high-speed transfer between combining unit and electric energy meter by optical cable.The electrical energy pulse outfan of digital electricity meter is connected with the above-mentioned electrical signal collection device that can gather calculating correction values center, by electric power signal output to calculating correction values main frame.By the gps antenna installed in each device, obtain the GPS standard time, with GPS second pulse and B code signal as synchronizing signal, realize the variable of digital electricity meter, the information of voltage of the combining unit of substation secondary side, current signal, phase place, frequency, in the same time, the collection of duration, improve the precision of combining unit and electric energy meter metering difference.
Using the intelligent substation secondary side electric energy metered system of the present embodiment, its measuring method is as follows:
1), select tested voltage combining unit and electric current combining unit in substation secondary side, make outfan correspondence access voltage circuit and the current loop of electric energy meter by optical Ethernet switch；
2), secondary side voltage measuring apparatus serial access the voltage input circuit of voltage combining unit, and do not affect the properly functioning of voltage combining unit；Secondary side current measurement apparatus serial accesses the electric current input circuit of electric current combining unit, needs the short circuit of current loop of former access combining unit, to guarantee the properly functioning of electric current combining unit before access；
3), the computer pulse outfan of electric energy meter is accessed electric energy acquisition and calculate the electrical signal collection device at center；
4), secondary side current measurement apparatus, secondary side voltage measuring apparatus and electric energy acquisition calculate center and assemble wireless GPRS module and GPS module or Big Dipper module the most accordingly；
5), by wireless network, secondary side current measurement apparatus, secondary side voltage measuring apparatus calculate center with electric energy acquisition respectively and are connected, and electric energy acquisition calculates center as server, structure detecting system；Detection scheme is formulated at electric energy acquisition calculating center, including starting to gather time and the duration of metering, tested combining unit and the parameter of corresponding electric energy meter, detect the information such as content；
6), with the time standard unified based on GPS module or Big Dipper module, start secondary side current measurement apparatus, secondary side voltage measuring apparatus and electric energy acquisition at the timing synchronization drafted and calculate center, carry out the electric current of three-phase electricity, voltage signal acquisition, and the electrical energy pulse collection of electric energy meter, carry out the on-line checking of electric energy metrical accuracy；On-line checking content includes: false actuation test, firing test, constant are tested；Under balanced load, different capacity factor, the electric energy elementary error test of different current value；Under unbalanced load, different capacity factor, different current value forward meritorious, the most meritorious, forward is idle, the test of reverse reactive energy elementary error.
7), comprehensive secondary side current measurement apparatus, the variable of secondary side voltage measuring apparatus, and the electrical energy pulse variable of electric energy meter, compare the metering difference of combining unit and electric energy meter, it is thus achieved that measurement result；
8), complete to measure, secondary side current measurement apparatus, secondary side voltage measuring apparatus are disconnected with corresponding combining unit, and voltage combining unit and electric current combining unit are restored to the original state.
The above only have expressed the preferred embodiment of the present invention, and it describes more concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation, improve and substitute, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. the on-line detecting system of intelligent substation secondary side electric energy metered system, it is characterised in that: include,
Secondary side current measurement apparatus, for gathering and measure the current-mode analog quantity of electric current combining unit；
Secondary side voltage measuring apparatus, for gathering and measure the voltage analog of voltage combining unit；
Electric energy acquisition calculates center, including electrical signal collection device and calculating correction values main frame, for the electricity of the electric energy meter of branch road, with
And above-mentioned secondary side current measurement apparatus and and the reception of coherent signal of secondary side voltage measuring apparatus output, and carry out comprehensive
Calculate；
Sync identification device, for several GPS or big dipper clock synchronization module, respectively with above-mentioned secondary side current measurement apparatus,
Secondary side voltage measuring apparatus, collection calculate main frame and connect, for making three according to unified clock synchronous operation；
Radio network communication devices, for several wireless network cards, respectively with above-mentioned secondary side current measurement apparatus, secondary side voltage
Measurement apparatus, calculating correction values main frame connect, and communicate wirelessly and transmit with data between three.
The on-line detecting system of intelligent substation secondary side the most according to claim 1 electric energy metered system, it is characterised in that
Described electric energy meter is digitalized electrical energy meter, described voltage combining unit and electric current combining unit, by optical cable be respectively connected to light with
Too network switch, it is achieved the digital quantity transmission between combining unit and electric energy meter.
The on-line detecting system of intelligent substation secondary side the most according to claim 1 electric energy metered system, it is characterised in that
Described wireless communication apparatus is GPRS module, by wireless access corresponding network, it is achieved wireless data transmission.
4. use an On-line Measuring Method for intelligent substation secondary side electric energy metered system described in claim 1, including with
Lower step:
1), select tested voltage combining unit and electric current combining unit in substation secondary side, made by optical Ethernet switch
Outfan correspondence accesses voltage circuit and the current loop of electric energy meter；
2), by secondary side current measurement apparatus and secondary side voltage measuring apparatus serial line interface respectively with electric current combining unit and
The input circuit correspondence of voltage combining unit connects；
3), the computer pulse outfan of electric energy meter is accessed electric energy acquisition and calculate center；
4), secondary side current measurement apparatus, secondary side voltage measuring apparatus and electric energy acquisition calculating center are assembled the most accordingly
GPS or big dipper clock synchronization module and wireless GPRS module, GPS or big dipper clock synchronization module are provided with pulse per second (PPS) dress
Put；
5), by wireless network, during secondary side current measurement apparatus, secondary side voltage measuring apparatus calculate with electric energy acquisition respectively
The heart connects, and electric energy acquisition calculates center and calculates the communication channel at center as server, foundation with electric energy acquisition, builds and measures
System；
6), according to the unified time, secondary side current measurement apparatus, secondary side voltage measurement are started at the timing synchronization drafted
Device and electric energy acquisition calculate center, and the electrical energy pulse carrying out the electric current of three-phase electricity, voltage signal acquisition, and electric energy meter is adopted
Collection, carries out the on-line measurement of electric energy metrical accuracy；
7), comprehensive secondary side current measurement apparatus, the variable of secondary side voltage measuring apparatus, and the electric energy arteries and veins of electric energy meter
Rush variable, compare the metering difference of combining unit and electric energy meter, it is thus achieved that measurement result；
8), complete to measure, secondary side current measurement apparatus, secondary side voltage measuring apparatus are disconnected even with corresponding combining unit
Connect, restore to the original state.
The On-line Measuring Method of intelligent substation secondary side the most according to claim 4 electric energy metered system, it is characterised in that
Described step 2) in, before secondary side current measurement apparatus accesses the input circuit of electric current combining unit, need to be by this input circuit
Short circuit, it is ensured that electric current combining unit properly functioning.
The On-line Measuring Method of intelligent substation secondary side the most according to claim 4 electric energy metered system, it is characterised in that
Described step 6) in, the described unified time is according to described GPS or the pulse per second (PPS) of big dipper clock synchronization module output and B code
Signal acquisition.
The On-line Measuring Method of intelligent substation secondary side the most according to claim 4 electric energy metered system, it is characterised in that
Described step 6) in, on-line measurement content includes, false actuation test, firing test, constant are tested；Under balanced load, no
Same power factor (PF), the electric energy elementary error test of different current value；Under unbalanced load, different capacity factor, different electric current
The forward of value is meritorious, the most meritorious, forward is idle, the test of reverse reactive energy elementary error.
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Cited By (3)
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| CN110940854A (en) * | 2019-11-14 | 2020-03-31 | 国网江西省电力有限公司电力科学研究院 | Alternating current synchronous electric energy metering system based on Beidou/GPS clock |
| CN111650465A (en) * | 2020-07-18 | 2020-09-11 | 国网山西省电力公司电力科学研究院 | A voltage and current split power quality measurement device and method for smart substations |
| CN115436869A (en) * | 2021-06-02 | 2022-12-06 | 太原市优特奥科电子科技有限公司 | Wireless electric sensor, electric parameter measurement calculation device, method and system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940854A (en) * | 2019-11-14 | 2020-03-31 | 国网江西省电力有限公司电力科学研究院 | Alternating current synchronous electric energy metering system based on Beidou/GPS clock |
| CN111650465A (en) * | 2020-07-18 | 2020-09-11 | 国网山西省电力公司电力科学研究院 | A voltage and current split power quality measurement device and method for smart substations |
| CN115436869A (en) * | 2021-06-02 | 2022-12-06 | 太原市优特奥科电子科技有限公司 | Wireless electric sensor, electric parameter measurement calculation device, method and system |
| WO2022252664A1 (en) * | 2021-06-02 | 2022-12-08 | 太原市优特奥科电子科技有限公司 | Wireless electrical sensor, and electrical parameter measurement and calculation apparatus, method and system |
| CN115436869B (en) * | 2021-06-02 | 2024-06-28 | 太原市优特奥科电子科技有限公司 | Wireless electric sensor, electric parameter measurement and calculation device, method and system |
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Application publication date: 20160810 |